Before that the text version of the sub_form was stored on the proxy field instance.
If you want to use list datetime fields, I'll add a note on UpgradeNote wiki page.



git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@17537 20353a03-c40f-0410-a6d1-a30d3c3de9de